|
Chemical formula
|
(Mg 2 Al 2 )Si 8 O 2 0(OH) 2 ·4H 2 O |
|
Crystalline System
|
Monoclinic |
|
Class
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Silicates |
| Origin | Segovia, Spain |
| Size |
Medium: 3.00-4.00 cm Large: 4.00-5.00 cm |
Raw palygorskite.
This curious mineral that comes from the alteration of magnesium silicates in soils and sediments is called "Mountain Leather" or "cardboard stone" due to its flexibility. It is a mineral that can be bent and does not break. It is usually found in amorphous sheets.
The piece you receive may differ slightly from the photo shown, since the minerals are natural and no pieces are identical. The size is approximate.